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Expired Canadian patentCanada

High frequency signal suppression component

CA 1297148 C · Owner: Rca Licensing Corporation · Inventors: Clayburn, Randall Cross

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

RCA 83,439, ABSTRACT OF THE DISCLOSURE A signal suppression component such as a ferrite shield bead includes a cylindrical magnetically permeable member that has a longitudinal passage formed through it. The passage is filled with an elastic silicone rubber material. When the component is placed on a conductor or component lead, the elastic material forms a damping layer between the conductor and the permeable member to prevent audible vibration of the element due to current flow in the conductor. Such a component is especially useful in a line rate deflection circuit and in a resonant retrace power supply circuit.

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted March 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 10, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 25, 1987
GrantedMarch 10, 1992
Term endedMarch 10, 2009
Patent numberCA 1297148 C
Classification (IPC)H04N5/21 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedJune 25, 1987Patent grantedMarch 10, 1992Term endedMarch 10, 2009

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.